Synthesis, structure and inclusion properties of cone-tris{[(5'-methyl-2,2'-bipyridyl)-5-yl]oxycarbonylmethoxy}hexahomotrioxacalix[3]arene

摘要

Hexahomotrioxacalix[3]arene having [(5'-methyl-2,2'-bipyridyl)-5-yl]oxycarbonylmethoxy group with cone conformation was prepared, which shows strong Ag~+ affinity and acts as a ditopic receptor for Ag~+ and nBuNH3~+. A conformational change of 2,2'-bipyridyl moiety from the original outward orientation of the ring nitrogen to the inside orientation toward the thiacalixarene cavity was observed in the process of Ag~+ complexation.